Dude, thats way to much DDRV. You dont need more then 2.7volts if that, for this type of OC. You have to increase voltage to your cpu. Set your cpu voltage to 1.6volts. Make sure your AGP is at a 1:1 ratio too.

You need to learn how to OC before you try. Your going to end up corrupting windows man. Thats a very simple OC too, you dont even need to change your RAM timings.